Everything is SUPER but there is only 1 thing I cannot understand.
Why 12v? there are plentiy of engines starting with 3.0 24v and ending with 6.0 v12.
The best engine for w124 would be (in my opinion) m104 3.6 (bored and stroked) + massive turbo.
Or
M119 5.0-> bored and stroked to 6.0 + twin turbo (or supercharger)

Anyway massive respect, 560hp is not a simple power
Any 1/4 mile times or 0-100 acceleration times?